Slow light beam splitter
Slow light beam splitter
复制标题
DOI：
10.1103/physrevlett.101.043601
复制
发表时间：
2008-07-25
影响因子：
8.6
通讯作者：
Walsworth, Ronald L.
中科院分区：
文献类型：
--
作者：
Xiao, Yanhong;Klein, Mason;Walsworth, Ronald L.
我们演示了一种在涂墙原子蒸汽室中使用快速相干输运的慢速分束器。我们发现，处于随机和无定向经典运动的粒子可以调节两个或多个光学模式之间的相干相互作用。在一个横向位置使用输入光信号通过电磁感应透明写入原子的相干性，通过原子弹道运动传播，由反弛豫壁涂层保存，然后在输入通道和空间分离的第二通道中在出射慢光信号中被取回。两个输出通道之间的分束比可以通过调节激光功率来调节。慢光分束器可以改善量子中继器的性能，并可用作全光动态可重构路由器。
We demonstrate a slow light beam splitter using rapid coherence transport in a wall-coated atomic vapor cell. We show that particles undergoing random and undirected classical motion can mediate coherent interactions between two or more optical modes. Coherence, written into atoms via electromagnetically induced transparency using an input optical signal at one transverse position, spreads out via ballistic atomic motion, is preserved by an antirelaxation wall coating, and is then retrieved in outgoing slow light signals in both the input channel and a spatially-separated second channel. The splitting ratio between the two output channels can be tuned by adjusting the laser power. The slow light beam splitter may improve quantum repeater performance and be useful as an all-optical dynamically reconfigurable router.